.484 purple shaft grind info.

Thanks for the info.
I multiplied the comp cams advertised duration by .750 to show that it came out wrong.
The comp cam is really 240 @ 50 per comp cams info.

So then i used .850 as the number to use and it came out right at 240@50.

This was using information that is provided in some of the mopar engine books.

Your so right about ramp speed.
This is one thing that when shopping for a cam i never bought into.
What i mean by buying into is---- ALL THE EXTRA PARTS NEEDED TO RUN THE FASTER RATE CAMS.
When you have to go purchase.
1)new valve springs.
2)cut the valve seat area in the head
3)cut the valve guide boss down
4)install new positive valve seals
5)new rocker arms (roller)
6)new push rods
I think it's a waste of money to buy all these parts for just a cam change on an engine -----WITH STOCK HEADS.

Notice i said a stock headed engine.
If the money was put into a new short block with the new cam, plus you did some work on the stock cylinder head ports you would have a better performing engine ready for aftermarket heads in the future.